ci: fix tag_exists condition #40

Job	Run time
Commit Lint Job	11s
Hadolint Job (./validator/docker/csv-validator/Dockerfile)	9s
Editor Config Job	11s
Hadolint Job (./validator/docker/validator/Dockerfile)	10s
3rd Party Licenses Check	3m 6s
Test building docker images (./validator/docker/csv-validator/Dockerfile, schema-registry-csv-val)	22s
Hadolint Job (./validator/docker/xml-validator/Dockerfile)	10s
Test building docker images (./validator/docker/validator/Dockerfile, schema-registry-validator)	58s
Hadolint Job (./registry/docker/compatibility-checker/Dockerfile)	7s
Test building docker images (./validator/docker/xml-validator/Dockerfile, schema-registry-xml-val)	11s
Hadolint Job (./registry/docker/initdb/Dockerfile)	10s
Go lint job for all components (./registry)	9s
Test Job for all components	0s
Test building docker images (./registry/docker/compatibility-checker/Dockerfile, schema-registry-...	1m 48s
Hadolint Job (./registry/docker/registry/Dockerfile)	8s
Go lint job for all components (./validator)	5s
Test building docker images (./registry/docker/initdb/Dockerfile, schema-registry-initdb)	25s
Hadolint Job (./registry/docker/validity-checker/Dockerfile)	8s
Test building docker images (./registry/docker/registry/Dockerfile, schema-registry-api)	32s
Test building docker images (./registry/docker/validity-checker/Dockerfile, schema-registry-valid...	30s
	9m 30s

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